Each interior angle of a regular polygon is 144⁰. The number of sides of the polygon is 

A field in the shape of a trapezium whose parallel sides are 200 meter and 400-meter-long, whereas each of other two sides is 260 meter long. What is the area (in m²) of the field?

O is the incentre of ∆ABC and ∠A = 30° then ∠BOC is

The length of the common chord of two circles of radii 30 cm and 40 cm whose centers are 50 cm apart is (in cm) 

An arc of 30 ° in one circle is double an arc in a second circle, the radius of which is three times the radius of the first. Then the angles subtended by the arc of the second circle at its center is 

In ∆ABC, ∠B is a right angle, AC = 6cm, and D is the mid-point of AC. The length of BD is:

If AD, BE and CF are medians of ∆ABC, then which one of the following statements is correct? 

The radius of a circle is 14 cm. what is area of another circle having radius 1.5 times the actual circle?